'use client';

import type { ReactNode, MouseEvent } from 'react';
import { memo, useEffect, useCallback, useState, useMemo } from 'react';
import { Badge } from '@kandev/ui/badge';
import { SessionPanel, SessionPanelContent } from '@kandev/ui/pannel-session';
import { Group, Panel } from 'react-resizable-panels';
import { TabsContent } from '@kandev/ui/tabs';
import { getLocalStorage, setLocalStorage, getSessionStorage, setSessionStorage } from '@/lib/local-storage';
import { ShellTerminal } from '@/components/task/shell-terminal';
import { PassthroughTerminal } from '@/components/task/passthrough-terminal';
import { useAppStore } from '@/components/state-provider';
import { useLayoutStore } from '@/lib/state/layout-store';
import { useDefaultLayout } from '@/lib/layout/use-default-layout';
import { SessionTabs, type SessionTab } from '@/components/session-tabs';
import { useRepositoryScripts } from '@/hooks/domains/workspace/use-repository-scripts';
import { useTerminals } from '@/hooks/domains/session/use-terminals';
import type { RepositoryScript } from '@/lib/types/http';
import type { Terminal } from '@/hooks/domains/session/use-terminals';

type TaskRightPanelProps = {
  topPanel: ReactNode;
  sessionId?: string | null;
  repositoryId?: string | null;
  initialScripts?: RepositoryScript[];
  initialTerminals?: Terminal[];
};

const DEFAULT_RIGHT_LAYOUT: Record<string, number> = { top: 55, bottom: 45 };

const TaskRightPanel = memo(function TaskRightPanel({ topPanel, sessionId = null, repositoryId = null, initialScripts = [], initialTerminals }: TaskRightPanelProps) {
  const rightPanelIds = ['top', 'bottom'];
  const rightLayoutKey = 'task-layout-right-v2';
  const { defaultLayout: rightLayout, onLayoutChanged: onRightLayoutChange } = useDefaultLayout({
    id: rightLayoutKey,
    panelIds: rightPanelIds,
    baseLayout: DEFAULT_RIGHT_LAYOUT,
  });

  const [isBottomCollapsed, setIsBottomCollapsed] = useState<boolean>(() =>
    getLocalStorage('task-right-panel-collapsed', false)
  );

  const setRightPanelActiveTab = useAppStore((state) => state.setRightPanelActiveTab);
  const closeLayoutPreview = useLayoutStore((state) => state.closePreview);

  // Use the terminals hook
  const {
    terminals,
    activeTab,
    terminalTabValue,
    addTerminal,
    handleCloseDevTab: baseHandleCloseDevTab,
    handleCloseTab,
    handleRunCommand,
    isStoppingDev,
    devProcessId,
    devOutput,
  } = useTerminals({ sessionId, initialTerminals });

  // Wrap handleCloseDevTab to also close the layout preview
  const handleCloseDevTab = useCallback(async (event: MouseEvent) => {
    await baseHandleCloseDevTab(event);
    if (sessionId) {
      closeLayoutPreview(sessionId);
    }
  }, [baseHandleCloseDevTab, sessionId, closeLayoutPreview]);

  // Repository scripts - use initialScripts as fallback for SSR
  const { scripts: storeScripts, isLoaded: scriptsLoaded } = useRepositoryScripts(repositoryId);
  const scripts = scriptsLoaded ? storeScripts : (initialScripts.length > 0 ? initialScripts : storeScripts);
  const hasScripts = scripts.length > 0;

  // Restore 'commands' tab from sessionStorage (needs hasScripts check)
  useEffect(() => {
    if (!sessionId || !hasScripts) return;
    const savedTab = getSessionStorage<string | null>(`rightPanel-tab-${sessionId}`, null);
    if (savedTab === 'commands') {
      setRightPanelActiveTab(sessionId, savedTab);
    }
  }, [sessionId, hasScripts, setRightPanelActiveTab]);

  // Persist active tab to sessionStorage when it changes
  useEffect(() => {
    if (!sessionId || !activeTab) return;
    setSessionStorage(`rightPanel-tab-${sessionId}`, activeTab);
  }, [sessionId, activeTab]);

  // Save collapse state to local storage
  useEffect(() => {
    setLocalStorage('task-right-panel-collapsed', isBottomCollapsed);
  }, [isBottomCollapsed]);

  const tabs: SessionTab[] = useMemo(() => {
    const allTabs: SessionTab[] = [];

    // Only show Commands tab if scripts exist (from SSR or loaded)
    if (hasScripts) {
      allTabs.push({ id: 'commands', label: 'Commands' });
    }

    // Add terminal tabs (dev-server, shell, script)
    // Use closable from backend (source of truth) for shell terminals
    const terminalTabs: SessionTab[] = terminals.map((terminal) => {
      return {
        id: terminal.id,
        label: terminal.label,
        className: terminal.closable
          ? 'group flex items-center cursor-pointer'
          : 'cursor-pointer',
        closable: terminal.closable,
        onClose:
          terminal.type === 'dev-server'
            ? handleCloseDevTab
            : (e: MouseEvent) => handleCloseTab(e, terminal.id),
      };
    });

    return [...allTabs, ...terminalTabs];
  }, [hasScripts, terminals, handleCloseDevTab, handleCloseTab]);

  if (isBottomCollapsed) {
    return (
      <div className="h-full min-h-0 flex flex-col gap-1">
        <div className="flex-1 min-h-0">{topPanel}</div>
        <SessionPanel
          borderSide="left"
          className="!h-10 !p-0 mt-[2px] justify-between items-center flex-row"
        >
          <SessionTabs
            tabs={tabs}
            activeTab={terminalTabValue}
            onTabChange={(value) => {
              if (sessionId) {
                setRightPanelActiveTab(sessionId, value);
              }
            }}
            showAddButton
            onAddTab={addTerminal}
            collapsible
            isCollapsed={isBottomCollapsed}
            onToggleCollapse={() => setIsBottomCollapsed(false)}
            className="flex-1 min-h-0"
          />
        </SessionPanel>
      </div>
    );
  }

  return (
    <Group
      orientation="vertical"
      className="h-full min-h-0"
      id={rightLayoutKey}
      key={rightLayoutKey}
      defaultLayout={rightLayout}
      onLayoutChanged={onRightLayoutChange}
    >
      <Panel id="top" minSize={30} className="min-h-0">
        {topPanel}
      </Panel>
      <Panel id="bottom" minSize={20} className="min-h-0">
        <SessionPanel borderSide="left" margin="top">
          <SessionTabs
            tabs={tabs}
            activeTab={terminalTabValue}
            onTabChange={(value) => {
              if (sessionId) {
                setRightPanelActiveTab(sessionId, value);
              }
            }}
            showAddButton
            onAddTab={addTerminal}
            collapsible
            isCollapsed={isBottomCollapsed}
            onToggleCollapse={() => setIsBottomCollapsed(true)}
            className="flex-1 min-h-0"
          >
            <TabsContent value="commands" className="flex-1 min-h-0">
              <SessionPanelContent>
                <div className="grid gap-2">
                  {scripts.map((script) => (
                    <button
                      key={script.id}
                      type="button"
                      onClick={() => handleRunCommand(script)}
                      className="flex items-center gap-2 rounded-md border border-border px-3 py-2 text-sm text-left hover:bg-muted cursor-pointer min-w-0"
                    >
                      <span className="flex-1 min-w-0 truncate text-xs">
                        {script.name}
                      </span>
                      <Badge
                        variant="secondary"
                        className="shrink-0 font-mono text-xs max-w-[60%] min-w-0"
                      >
                        <span className="truncate block">
                          {script.command}
                        </span>
                      </Badge>
                    </button>
                  ))}
                </div>
              </SessionPanelContent>
            </TabsContent>
            {terminals.map((terminal) => (
              <TabsContent key={terminal.id} value={terminal.id} className="flex-1 min-h-0">
                <SessionPanelContent className="p-0">
                  {terminal.type === 'dev-server' ? (
                    <ShellTerminal
                      key={devProcessId}
                      processOutput={devOutput}
                      processId={devProcessId ?? null}
                      isStopping={isStoppingDev}
                    />
                  ) : (
                    <PassthroughTerminal
                      key={terminal.id}
                      sessionId={sessionId ?? undefined}
                      terminalId={terminal.id}
                      label={terminal.type === 'shell' ? terminal.label : undefined}
                    />
                  )}
                </SessionPanelContent>
              </TabsContent>
            ))}
          </SessionTabs>
        </SessionPanel>
      </Panel>
    </Group>
  );
});

export { TaskRightPanel };